What applications present the biggest challenge in terms of machine productivity?Carl/Ringfeder: Industrial applications, such as highly corrosive environments requiring special stainless steels, are the biggest challenges. Applications in which a locking device is dimensionally too large to fit into a component, or in which the torque requirements are beyond the capability of any device on the market, can also present a challenge.Blair/Ruland: The bolt pattern on locking devices can bring many challenges. Because of the time required to loosen and tighten the bolts, locking devices are not well suited for applications that require regular adjustments. Confined areas can also pose problems because of limited access to the bolt heads. Another challenge for locking devices is equipment with extended length shafts, which can be difficult to service because of the disassembly required, especially if the shaft is supported at both ends.

1625DE; Pumps--three Emsco FB-1,600 Triplex;Prime movers--four Cat. 3S126-B, Tech PowerSCR; Rotary Table--37 1/2"; Pipe Handling System--VarcoIron Roughneck; Top Drive--Varco TDS-3.DERRICK: 160'' Lee C. Moore; 1,000,000-lb hook ad.BOP SYSTEM: One 27 1/2" nom. Regan KFDJdiverter; one Hydril GK 13 5/8", 5,000 psi; Two CIW13 5/8", 10,000 psi double.CRANES: Three LeTourneau PCM-120 AS.WORK AREA: Gulf of Mexico.OCEAN NUGGETRIG DESIGN: Modified Levingston Class IIICONSTRUCTION: Levingston Shipbuilding Co.,

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